title: Proposal on 3-D endoscope by using grid-based active stereo.
abstract: In this paper, we propose a novel 3-D endoscope system by using grid-based active stereo. In the proposed system, projection of a waved-grid pattern that consists of vertical and horizontal sinusoidal lines realizes accurate shape acquisition in sub-pixel accuracy. We develop a small pattern projector implementable to a head of a ready-made endoscope, and examine 3-D shape reconstruction by actual equipment. As the result of the measurement for a known-shaped object, which is a hexagonal cylinder, the error of length measurement is below 0.9% and the error of angle measurement is below 2.2%. We make a measurement of animal organ meat, and confirm that the system can reconstruct a 3-D shape of the organ surface.
authors.forename: Hirooki
authors.initials: H
authors.lastname: Aoki
authors.forename: Ryo
authors.initials: R
authors.lastname: Furukawa
authors.forename: Masahito
authors.initials: M
authors.lastname: Aoyama
authors.forename: Shinsaku
authors.initials: S
authors.lastname: Hiura
authors.forename: Naoki
authors.initials: N
authors.lastname: Asada
authors.forename: Ryusuke
authors.initials: R
authors.lastname: Sagawa
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kawasaki
authors.forename: Shinji
authors.initials: S
authors.lastname: Tanaka
authors.forename: Shigeto
authors.initials: S
authors.lastname: Yoshida
authors.forename: Yoji
authors.initials: Y
authors.lastname: Sanomura
mesh_terms: D000465:Algorithms; D000818:Animals; D002138:Calibration; D019723:Endoscopes; D004724:Endoscopy / Q000295:instrumentation*; D021621:Imaging, Three-Dimensional / Q000295:instrumentation / Q000379:methods*; D008460:Meat; D009929:Organ Size; D010363:Pattern Recognition, Automated